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United States Patent | 5,019,777 |
Gulliver ,   et al. | May 28, 1991 |
An eddy current testing system consists of a multi-sensor probe, a computer and a special expansion card and software for data collection and analysis. The probe incorporates an excitation coil, and sensor coils; at least one sensor coil is a lateral current-normal coil and at least one is a current perturbation coil.
Inventors: | Gulliver; James A. (Wantage, GB2); Holt; Christopher C. (Abingdon, GB2); Boness; Kenneth D. (Blewbury, GB2); Anderson, deceased; Martin R. (late of Culham Station, GB2) |
Assignee: | United Kingdom Atomic Energy Authority (London, GB2) |
Appl. No.: | 431638 |
Filed: | November 6, 1989 |
Nov 07, 1988[GB] | 8825977 |
Current U.S. Class: | 324/242; 324/202; 324/225; 324/227; 324/262 |
Intern'l Class: | G01N 027/90; G01R 033/12 |
Field of Search: | 324/202,217,220,225,227,239-243,262 |
2889514 | Jun., 1959 | Cowan et al. | 324/217. |
2958818 | Nov., 1960 | Cowan et al. | 324/217. |
3504276 | Mar., 1970 | Proctor et al. | 336/200. |
3875502 | Apr., 1975 | Neumaier | 324/242. |
4325026 | Apr., 1982 | Cooper, Jr. et al. | 324/219. |
Foreign Patent Documents | |||
0260355 | Mar., 1988 | EP. | |
0739392 | Jun., 1980 | SU | 324/242. |
2201789 | Sep., 1988 | GB. |